129052172437 has 32 divisors (see below), whose sum is σ = 144730644480. Its totient is φ = 114438255360.

The previous prime is 129052172413. The next prime is 129052172449. The reversal of 129052172437 is 734271250921.

It is a de Polignac number, because none of the positive numbers 2^k-129052172437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129052172393 and 129052172402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129052172407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13679112 + ... + 13688542.

It is an arithmetic number, because the mean of its divisors is an integer number (4522832640).

Almost surely, 2^129052172437 is an apocalyptic number.

129052172437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

129052172437 is a deficient number, since it is larger than the sum of its proper divisors (15678472043).

129052172437 is a wasteful number, since it uses less digits than its factorization.

129052172437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 129052172437 in words is "one hundred twenty-nine billion, fifty-two million, one hundred seventy-two thousand, four hundred thirty-seven".